<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>老师作业</title>
    <link rel="stylesheet" href="style.css"/>
</head>
<body>
    <nav id="nav">
        <section class= "center">
            <h1 class= "logo">gitlog标题</h1>
            <ul class= "link">
                <li class="active"><a href="index.html">首页</a></li>
                <li><a href="#">一级标题</a></li>
                <li><a href="#">一级标题</a></li>
                <li><a href="#">一级标题</a></li>
                <li><a href="#">一级标题</a></li>
              
            </ul>
        </section>
    </nav>
     

    <header>头部区</header>
    <section>body区、段</section>
    <footer>页脚区</footer>
</body>
</html>